PKCS7_decrypt(3SSL) OpenSSL PKCS7_decrypt(3SSL)
PKCS7_decrypt - decrypt content from a PKCS#7 envelopedData structure
int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int
PKCS7_decrypt() extracts and decrypts the content from a PKCS#7
envelopedData structure. pkey is the private key of the recipient, cert
is the recipients certificate, data is a BIO to write the content to
and flags is an optional set of flags.
OpenSSL_add_all_algorithms() (or equivalent) should be called before
using this function or errors about unknown algorithms will occur.
Although the recipients certificate is not needed to decrypt the data
it is needed to locate the appropriate (of possible several) recipients
in the PKCS#7 structure.
The following flags can be passed in the flags parameter.
If the PKCS7_TEXT flag is set MIME headers for type text/plain are
deleted from the content. If the content is not of type text/plain then
an error is returned.
PKCS7_decrypt() returns either 1 for success or 0 for failure. The
error can be obtained from ERR_get_error(3)
PKCS7_decrypt() must be passed the correct recipient key and
certificate. It would be better if it could look up the correct key and
certificate from a database.
The lack of single pass processing and need to hold all data in memory
as mentioned in PKCS7_sign() also applies to PKCS7_verify().
PKCS7_decrypt() was added to OpenSSL 0.9.5
0.9.8g 2002-10-09 PKCS7_decrypt(3SSL)